Use one daq card to sample data in two different rates.

[hwang003]

I try to use one daq card (1200) to get two different kinds of data. For one kind, the sampling rate is 330 ms/sampling, and using Analog input channel 0-3. For the other the sampling rate is 100 ms/sampling, and using Analog input channel 4-5. I use visual c++ and use two threads. But it does not work. Could I use one daq card to sample data in two different rates? Thanks for your help.

[JustinBritten]

Unfortunately, you will be unable to sample at two different rates at the same time. Your board consists of one multiplexer (MUX) and one analog to digital converter (ADC). This hardware only allows for one sample rate to be configured at a given time. You may scan at 330 samples/second on channel 0-3, stop, end the analog input task, and then proceed to configure a new analog input task where you sample at 100 samples/second from channels 4-5.

Regards,
Justin Britten

Applications Engineer
National Instruments